20311374 has 32 divisors (see below), whose sum is σ = 41771520. Its totient is φ = 6581952.

The previous prime is 20311363. The next prime is 20311381. The reversal of 20311374 is 47311302.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20311374.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34309 + ... + 34895.

It is an arithmetic number, because the mean of its divisors is an integer number (1305360).

Almost surely, 2^20311374 is an apocalyptic number.

20311374 is an abundant number, since it is smaller than the sum of its proper divisors (21460146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311374 is a wasteful number, since it uses less digits than its factorization.

20311374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20311374 is about 4506.8141741146. The cubic root of 20311374 is about 272.8431789967.

Adding to 20311374 its reverse (47311302), we get a palindrome (67622676).

The spelling of 20311374 in words is "twenty million, three hundred eleven thousand, three hundred seventy-four".